\[\begin{align} & 0/3/6\times {{10}^{-4}}+3/0/1\times {{10}^{-6}}-\underset{\times }{\mathop{2/2}}\,\times {{\underset{=}{\mathop{10}}\,}^{3}}\times \underset{\times }{\mathop{6}}\,\times {{\underset{=}{\mathop{10}}\,}^{-9}}=3/6\times {{10}^{-4}}\times {{10}^{-1}}+3/01\times {{10}^{+1}}\times {{10}^{-6}} \\ & -13/2\times {{10}^{-6}}=3/6\times {{10}^{-5}}+3/01\times {{10}^{-5}}-1/32\times {{10}^{-5}}={{10}^{-5}}\left( 3/6+3/01-1/32 \right)=5/29\times {{10}^{-5}} \\ \end{align}\]